Image Number 7 for United States Patent #5195053.
A boundary region for wiring is provided by expanding one of a plurality of boundary regions boundary regions each being between adjacent ones of a plurality of decoder circuits included in a decoder circuit block corresponding to a memory cell array by shifting a desired portion of at least one of the decoder circuits by a desired distance and a wiring connecting wirings in the decoder circuit to a circuit provided outside the decoder circuit block is arranged in the boundary region for wiring, so that a circuit arrangement in a second region outside the decoder circuits can be made freely.
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